Hydraulic swivel.



PATENTED DEG. l0, 1907. H. G. JOHNSTON & J. B. NORRIS.

HYDRAULIC SWIVEL.

APPLICATION FILED MAR. 2, 1907.

, Unrrnn salirse PATENT OFFICE.

HORACE G. JOHNSTON AND JOSEPH B. NORRIS, OF CORSICAN'A, TEXAS, AS-SIGNORS TO THE AMERIGANxWELL it PROSPEOTING CO., OF CORSICANA, TEXAS.

` HYDRAULIC SWIVEL. I

Specicatien of Letters Patent.

Patented Dec.-10, 1 90'l7.

Application led March 2 190.7.' Serial No. 360.293.

To all whom 'it may concern."

Be' it known that we, HORACE G. JOHNS- TON and JOSEPH B.,NORR1s, citizens of lthe United States, residing at Corsicana, in the 5 "county of Navarro and State of Texas', have invented certain new and\ useful Improve- .ments in Hydraulic Swivels; and we do hereby declare thefollowiing to be a full, clear, and exact description of the invention, such as will'enable others skilled in the art to which it appertains to make and use the same. l .This invention relates to improvements in hydraulic swivels, and one of the objects in view is the controlling of back pressure.-

Another object in view is thefacilitating lof the adjustment o'f parts of the swivel which are subjected to wear and the ready locking of the parts intheir respective relations.

With these and further objects in view the linvention comprises,certain novel constructions, combinations and arrangements Aofparts as willbe hereinafter fully described and claimed.`

In the accompanying drawing-Figure 1 is a longitudinal, vertical, central section taken through a hydraulic swivel embodying the features of the present invention, parts being broken away. detail, horizontal section taken through the spider, forming the valve seat of the lower check valve.

In the drilling of oil wells it frequently happens that the drill penetrates a gas vein, and when the ordinary hydraulic swivel is being employed the back pressure reated by the gas-.blows the water supply hose off from its connection with the swivel, and in some instances the well is wrecked by the back pressure which is' not taken care of.' One of the objects of the present invention is toobviate the possibility of this disaster,

and another object is to provide means for locking the several moving parts of. the swivel with respect to each other in such manner that they will not readily loosen, and yet are capable of ready adjustment.

Referring to the drawing by numerals, 1 indicates a hose lstem onto the upper end of .which is threaded the usual goose neck fitting 2, which at its free end is threaded internally as indicated at 3 and is also threaded .externally as indicated ate.v Engaging the threads 4 is the coupling of a union, the 'an Fig. 2l is an enlarged,.

n'ular sleeve. 6 of said union being arranged with an annular outwardly turned flange interlocking with the annui ai' inwardly turned iange of the coupling 5. At the outer. end of the sleeve 6 is arranged an annular bead 7, and in practice any suitable hose ppc 8 is forced onto the sleeve 6 for a-suitable distance, the bead- 7 serving 'to retain ,the hose 8v against removal. vIt is obvious, of course, that any suitable hose clamp may be emp loyedl if desired fOr -rmlyretaining the hose in position on the sleeve 6. A bushing 9 is threaded into the threads 3 and at its inner end is formed into a valve -seat 10, at times adapted'to .receive a ball valve l1. The iitting 2 is providedA with lugs 12, 12, which serve in operation to prevent the ball valve 11 from droppingv down into the hose 'stem l. l I

, The hose stem 1 extends downwardly through a swivel stem 13, said swivel stem being provided at its-upper end with an an.

nular recess 14 supplied .with any preferred packing, which packing is designed to be compressed by a gland 15, the upper end'of which gland is engaged by the inwardlv extending annular flange of a cap 16, which is threaded ontothe upper end of the swivel stem 13.. The cap 16 is preferably locked in .position by a suitable "lock nut 17 which isY threaded onto the swivel stem below the cap 16. The threading of the cap 16 down upon the gland 15 compresses the packing in the recess 14 and thus produces a tight joint between the swivel stein andthe hose stein. An annular cap 18 is threaded onto the upper endv of the cap 16 and forms an annular housing about the hose stem'l closed at its upper end by an inwardly extendinf annular flange. Mounted on the upper end of the cap l16 within the housing formed byv cap 18 is a bearing ring19 formed with an annular race-way in which are arranged ball or other suitable bearings 20, which bearings support a bearing ring 21.- The bearing ring 21 is .fixed t0 the hose stem 1in any suitable man- -so l nerso as to revolve therewith'. A screw 2 2 isindicated '1n-'the drawing vas a securing means for fastening the ring 2'1 :to the hose f stem 1, but it is ofcourse obvious that any suitable means of attachment maybeprovided. The. ring21 is formed with a race-` way .on vits' under surfaceint whichv the upper pertions of the bearings 20 extend,'and the said-ring isfformed with a similarA raceway in its upper surface supporting ballor.

other suitable antifriction bearings 23 upon which rests a bearing ring or collar '24 which the swivel `stern the swivel stern independent of i gage nut being internallythreaded at itsY lower -stem 13 up to engagement iS fOIDed-with a suitable race-way forreceiving tlie upper portions of the bearings .23. The annular flange at the upper end of` y over the' the cap 1'8 preferably fits snug ring' 24, and thus the hose stem 1-is sustained 'in position ,whilepermitting the surrounding parts to be freely rotatable about the stein. A supporting 13 and is engaged by a suitable bail 26, only a fragment of .which is indicated, as the said'bail and swivelblock are not features of novelty in this application,

' the same havingbeen fully disclosed vin the patent to H. G. Johnston, one of the applicants herein, No. 742,667, dated Oct. 27, `1903;' Surrounding the. swivel stein 13 above the blqck'25are bearing rings 27 and 28 spaced apart by any suitable bearings'29 which ride in suitable'race-ways formed in said rings.

The bearing ring 27 'preferably rests'u'pon theupper surface of the bloclr25,

and the bearing ring 28 is' engaged vby a; nut' stem .13 and-which yis" formed near its lower end with an annular `cut-away portion 33, the sleeve provided ivith-a set screw 39which in operationv is preferably threaded into engagement with the outer surface of the swivel stem 13 for positively locking the sleeve32 against movement.|

locking sleeve nut 35 surrounds the swivel 'stem 1 3 and is per end', as at the internal threads .34, the said sleeve end, as at 37, which internal threads engage the 'external threads 38 formed'at the lower 4end of the yswivel stem 13.

. 'A bushing 40.is internally threaded and threaded onto the threads 37 of theswivel with the lower 'l edge of the locking sleeve nut 3.57 the lower A tlireadedas' at 41 for the sizes of 4'0 heilig externally reception of various ushingsv connected with the different sizes 1'of yell pipes. The bushing 40 extends below the lower end of the swivel stem 13 end of the ,bushing and the hose' stern 1 also'preferably extends or swivel block-25 surrounds reception 'of a rotating '.tool.

. or disk of rubber-- or or flange 31 is prefer.

being internally threaded, as at- 34, at the point' of the' cut-away portion 33.' The sleeve 32 is preferably externally Ithreaded at its up' 36, which external threads en-.

'is first threaded onto below the'lower end of said swivel stem sothat an' annular space is 'left between the bushing 40 and the lower e'nd 'of the lhose stem 1. Below the lower end ofthe swivel stem 13 andy in thesaid space is preferably 'placed packing 42 which is retained in place' and preferably compressed bya. gland4'3 threaded intovthe. ,sleeve 40', the said gland fitti-ng snugly between'the lower end lof lthe The gland" 43 extends below the lower end .of the swivel.' stein `1 and swivel stem 14 andthev sleeve 40..

' beneath .said swivel ,stern is formed with a spider1 44 of4 any preferred type', so as to forni the seat for 'a valve. 45.

'llie gland 43 thus forms a combination glandl and valve seat and is preferably provided as. seen in Fig'. 2,nl withhotches 46, 46, for the combination gland andl valve seat 43 is threaded upwardly in the sleeve 40 sufficiently for compressing the packing 42 longit'udinally and expanding -the same later-V ally to a suflicient extentfor preventing the admission of foreign substances between the hose stem 1 and the swivel stem 13. The valve V45is of' .comparatively simple --construction and consists preferably .the valvebemg perforated centrally and a supporting bolt 47 being passed therethrough and threaded into the central yportion of the spider 44.

45 and normally retains the same against lthe 4 valve sea-t formed'by, the spider 44.. to connectthe present improved, hydraulic swivel vto the' In operation it .is common usual well pipe and supply water through the hose S, the w'ater passing the valvesy 11 and 45 by causing the from their seats. It will ofcourse be obvious that ifany back pressure'occurs the valve 45 will be first thrown to its seat and will resist the admission of pressure In practice the' of a block other suitable material4 45a backed preferably by a plate of inetd-4 5,l

said valves to-fmove back to the'h'ose stem 1,'

A spring 48 is interposed lbel tween the head ofthe bolt 47 and the valve but if any pressureshould be admitted the valve' 11 will be thrown effectually resist theescape of pressure' from the swivel and thiiseifectually protect the; hose 8 from being injured or removed.

In assembling lthe parts ofthe present improved hylraulic swivel which are 4arranged below the supporting block 25, the 'sleeve 32 wardly bn the lower end ofthe swivel ste-m vto its seatl and will the ysleeve locking nut and thetwo' are slid longitudinally-up# 13 until the threads 37 engage thel threads '38, and then the two'sleeves, are'passedon 'up the swivel stern by threading the sleeve lock nut 35y upwardly.' The bushing'40'1s then threaded onto the, lower end of the swivel stem 13 and the sleevellockl nut` 35is next threaded down upon the bushing4 40 for irml-y'pressing `it in place for prevent-nig ac-`V cidental loosening'thereof. Next thesleeve 'threaded upwardly on the threads 34 and '36 until the upper end of the sleeve 32, engaging the block 25, moves the said block to the' desired position with the bearingsf29 and `their surrounding parts in vproper relation. The set screw 39 is vthen threaded home for locking the sleeve '32 against rotation.. yIt is to be noted that any wear of the Y bearings-29 or contacting parts may be readily taken up by simply loosening the set screw 39 and threading the sleeve32 a little `farther upward according to the amount ot p Wear 'to be taken up, and then tightening the set s/crew39 again. After the bushing' 40 has 1'5 been'locked inA place as described, the packiiig 42 is inserted and the combination gland and valve seat together 'with the valve carried thereby is threaded up into the bushing 40 for compressing the packing 42 as above 2t) ldescribed.

In operation the bail 26 is engaged in any preferred manner by a coupling or other supporting means, and when it is desired to add a. section of the well pipe, the bushing of the Well pipe which engagesthethreads 41 of the blushmg* 40 is disconnected'trom its bushing 40and the entire hydraulic swivel iselevated through the medium engaging the bail 2G. Thus the Said bail and connected parts con- 30 stitute a support for the swivel stem when the swivel 'stem is disconnected and when the swivel stem is connected to the well pipe the supporting block 25 and connected parts are sustained by the sleeve 32.

That we claim is,` A 1. In a hydraulic swivel, the combination, with a swivel stem and a hose stem discharging therethrough, of a check valve disposed contiguous to, and in axial alinement `with 40' the swivel stem and adapted to prevent the admission of back pressure to the hose stem,

2. In hydraulic swivel, the combination, with a'swivel stem and a hose stem discharging t-herethrough and having a stuffing box disposed for preventing admission of fluid between the hose and swivel stem, ot a packing gland for said stuffing` box formed with a valve seat, and a check valve adapted to engage said seat for preventing the admission of back pressure to a hose stem.

' 3. In a hydraulic. swivel, the combination, with a swivel stem and hose stem discharging therethrough, of a check valve at one end of the hose Stem for preventing the admission ot' back pressure thereto, and `a check valve at the outside end of the hose stem for preventing the escape ot back pressure through the hose stem.

4. In hydraulic swivel, the combination,

50 with a swivel stem and a hose stem discharging therethrough, of a goose-neckv fitting connected with the upper end of the hose stem and provided near its outer end with a rei5 wardly from said seat, and avalve dispos'edng vbeing adaptedto movable valve seat and a stop spaced in-gbl k engaging the threads of the swivel stem, and

the upper. one of said sleeves contacting with said supporting block, threaded on to the swivel stem into contact with the lower one of the first mentioned sleeves Jfor preventing displacement thereof.

6. In a hydraulic swivel, the combination with a swivel stem and a. hose stem discharging therethrough, of a iitting arranged at the upper end of said hose stem, a bushing threaded into the end of said fitting and formed at its end into a valve seat, a ball valve disposed within said iitting, means for limiting the movement of said valve away from said seat, and means for supplying water to the free end of said iitting.

T. In a hydraulic swivel, the combination with a threaded swivel stem and a hose stem revolubly connected therewith, of a supporting block for said swivel stem, means for revolubly supporting said swivel stem upon said block, sleeves threaded -together and surrounding said swivel stem, one of said sleeves being formed with threads adapted to engage the threads ot the swivel stem, and the vother of said sleevesbeing adapted to engage said supporting block,

8. In a hydraulic swivel, the combination with a threaded swivel stem and a hose stem therefor, of a supporting block for said swivel stem, and means revolubly supporting the swivel stem thereon, sleeves threaded together and surrounding the swivel stem, one of the sleeves being formed with threads engaffing the threads of the swivel stem and the other of the sleeves being adapted to engage the supporting by the second mentioned sleeve in position for engaging the swivel stem.

9. In a hydraulic swivel, the combination with a swivel stem threaded at its lower end and a hose stem for said swivel stem, of a supporting block for sustaining said swivel stem, means for revolubly sustaining said swivel stem on said supporting block, a pair of sleeves threaded together, one of said sleeves being threaded onto the lower end of the swivel stem, and a bushing threaded onto the lower end of the swivel's'tem and adapted to be engaged by one of sa-id sleeves for 'being locked in position, the other ot said sleeves engage the supporting for sustaining the same in position.

uit? yInahydraulic'swivel, the combination and a third sleeve block, and a set screw carried with a swivel stein and hose stem therefor, of a bushing threaded onto the lower end of said swivel stem, a valve seat threaded into said bushing anda eheck valve for said seat adapted to be thrownto said Valve seat by back pressure. i

11. ln a hydraulic swivel, the combination with a: swivel stein and a hose stein therefor, of a bushingthreaded ^onto the lower end of said swivel stein, a Valve seat threaded into said bushinga and formed with a spider, and an upwardly acting` cheek Valve carried by the spider beneath the saine.

12. ln a hydraulio swivel, the combination with a swivel stein and a hose stein therefor, of a bushing threaded onto the lower end'of said swivel stern, 'a looking sleeve nut threaded onto the swivel steinv above the bushing and threaded down upon the bushing for locking thesanie in position, a sleeve threaded onto the said looking sleeve nut, a set screw carried by said last mentioned sleeve in position for engaging the swivel stem, a supporting block sustained in position by said last .mentioned sleeve, and means for revolubly supporting said swivel stem upon said supporting block.

13. ln a hydraulic swivel, the combination with a swivel stern and a hose stern discharging therethrough, of a bushing threaded onto the lower end .of said swivel stern, a valve l seat threaded into said bushing;r and extending below the hose stein, and a cheek Valve `sustained by said VaLVe seat.

I4. ln` a hydraulic swivel, the combination with a swivel stern and a hose stem therefor,

oit' a bushing threaded onto the lower end of said swivel stem, a valve seatthreaded into said bushing and formed with a spider, a

`bolt threaded into the *spider and formed with a head, a Valve surrounding the bolt,l and a spring interposed between the bolt and the bolt `head Jfor normally retaining the valve on said seat.

15. Ina hydraulic swivel, the-combination with a swivelsteni and a hose stem extending below the same, of a bushing threaded' into the lower end of the swivel stem and ex tending below the swivelstern prodneir'ig4 an annular inelos'ed space between itself andthe hose stern, and beneath the lower end of the swivel stein, a combination land and valve seat threaded onto said busving and `ittingv about the lower end of the hose stein, acking interposed between the said 'glan and the lower end of the swivel stem, anda valve cooperating with said valve seat for prevent- Y ing the admission of back pressure to the hose v stern.

In testimony-whereof we afhx our signatures 1n presence of two witnesses.

HORACE e. JoHNsToN.y Josera B. Nonnis,

Witnesses to signature of Horace G. Johnston: I. N. JOHNSTON,

J. H. JoHNsToN.

l Witnesses to signatnre of Joseph B. Nor-- ris:

DON HAGHER. W. J. HALL. 

